femtosecond

noun

fem·​to·​sec·​ond ˈfem(p)-tə-ˌse-kənd How to pronounce femtosecond (audio)
-kənt,
-tō-
: one quadrillionth of a second

Examples of femtosecond in a Sentence

Recent Examples on the Web The resulting oscillator has reduced the jitter in the system to just 15 femtoseconds Today, these applications rely on microwave oscillators. IEEE Spectrum, 19 Mar. 2024 But atoms in a molecule move in billionths of a second, aka femtoseconds; electrons move and change energies faster, between one and a few hundred attoseconds. Jennifer Ouellette, Ars Technica, 3 Oct. 2023 This means processing speeds in devices based on them could reach femtoseconds, a million times as fast as the speeds achievable with current gigahertz electronics. IEEE Spectrum, 6 Nov. 2023 Electrons in semiconductors usually scatter after traveling just nanometers, on a timescale measured in femtoseconds. IEEE Spectrum, 6 Nov. 2023 The researchers shone infrared laser pulses 250 femtoseconds long on top of the channel to help accelerate electrons down it. IEEE Spectrum, 24 Oct. 2023 For many years light pulses were stuck in the femtosecond regime (one femtosecond is 1000 attoseconds). Daniel Garisto, Scientific American, 3 Oct. 2023 In the 1980s, Ahmed Zewail at the California Institute of Technology developed the ability to make lasers strobe with pulses lasting a few femtoseconds — thousands of attoseconds. Charlie Wood, Quanta Magazine, 3 Oct. 2023 The problem was fundamental: even the briefest physically achievable optical laser pulse was a few femtoseconds in length. Daniel Garisto, Scientific American, 3 Oct. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'femtosecond.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1976, in the meaning defined above

Time Traveler
The first known use of femtosecond was in 1976

Dictionary Entries Near femtosecond

Cite this Entry

“Femtosecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/femtosecond. Accessed 28 Apr. 2024.

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